When you just fill in a small gap on the edge, there is not enough contact area between the repair and the board. It is not as strong as the original so it is going to pop out or crush when it gets hit.
Totally agree on this point. Just did some 2nd-gen repairs with better tapering. Hope they hold up better.
Will check out the materials. Really appreciate the detailed procedure. Will also check on the room at the back of the trunk. Putting the boat together tonight for some sailing over the weekend!